工作在放大区的某晶体管，如果测得晶体管时，而时，则该管的交流电流放大系数为 。https://edu-image.nosdn.127.net/7FC38709269C749C5A82FF96774C68F3.bmp?imageView&type=jpeg&thumbnail=520x520&quality=100https://nos.netease.com/edu-image/74AC9385509D7974037EE3A1D9941AD7.bmp?imageView&type=jpeg&thumbnail=520x520&quality=100https://nos.netease.com/edu-image/AA973BD9ACC72AF64AB9ADC45965144E.bmp?imageView&type=jpeg&thumbnail=520x520&quality=100https://nos.netease.com/edu-image/18ECF088530889AD50BD8C1B26E15F8D.bmp?imageView&type=jpeg&thumbnail=520x520&quality=100

在如图所示的电路中，若把上偏置电阻短路，则该电路中的晶体管将会处于 状态。https://edu-image.nosdn.127.net/D152C1AF9CF9A81DAD26A4099579794D.bmp?imageView&type=jpeg&thumbnail=520x520&quality=100https://nos.netease.com/edu-image/0F3A32CF51F7545473344AA0CBF8D428.bmp?imageView&type=jpeg&thumbnail=520x520&quality=100

在共射基本放大电路中，当一定时，在一定的范围内增大发射极电流，则放大电路的输入电阻 。https://edu-image.nosdn.127.net/16734658C55B32424E028FF58C5548A9.bmp?imageView&type=jpeg&thumbnail=520x520&quality=100https://nos.netease.com/edu-image/AF872F4BB1E61FFBF36969F3FA21CC23.bmp?imageView&type=jpeg&thumbnail=520x520&quality=100

当输入电压幅度一定时，放大电路空载输出电压为，带上负载后的输出电压为，二者相比应为 。https://edu-image.nosdn.127.net/356FAC01463A740CB812C53FE743F524.bmp?imageView&type=jpeg&thumbnail=520x520&quality=100https://nos.netease.com/edu-image/FBC70F47908B3806CAB113273A155323.bmp?imageView&type=jpeg&thumbnail=520x520&quality=100

https://edu-image.nosdn.127.net/CE6805FAC91ED4580C7C8987D54D91C8.bmp?imageView&type=jpeg&thumbnail=520x520&quality=100